third_party/llvm-7.0/llvm/test/Instrumentation/AddressSanitizer/with-ifunc.ll

; Test -asan-with-ifunc flag.
;
; RUN: opt -asan -asan-module -S -asan-with-ifunc=0 < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC
; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=1 < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC-NOREMAT

; Pre-Lollipop Android does not support ifunc.
; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android20 < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android21 < %s | \
; RUN:     FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC

target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv7--linux-android22"

; CHECK-IFUNC: @__asan_shadow = external global [0 x i8]
; CHECK-NOIFUNC: @__asan_shadow_memory_dynamic_address = external global i32

define i32 @test_load(i32* %a) sanitize_address {
; First instrumentation in the function must be to load the dynamic shadow
; address into a local variable.
; CHECK-LABEL: @test_load
; CHECK: entry:

; CHECK-IFUNC-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
; CHECK-IFUNC-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
; CHECK-IFUNC-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], ptrtoint ([0 x i8]* @__asan_shadow to i32)

; CHECK-IFUNC-NOREMAT-NEXT: %[[S:[^ ]*]] = call i32 asm "", "=r,0"([0 x i8]* @__asan_shadow)
; CHECK-IFUNC-NOREMAT-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
; CHECK-IFUNC-NOREMAT-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
; CHECK-IFUNC-NOREMAT-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], %[[S]]

; CHECK-NOIFUNC-NEXT: %[[SHADOW:[^ ]*]] = load i32, i32* @__asan_shadow_memory_dynamic_address
; CHECK-NOIFUNC-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
; CHECK-NOIFUNC-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
; CHECK-NOIFUNC-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], %[[SHADOW]]

entry:
  %x = load i32, i32* %a, align 4
  ret i32 %x
}